Does Fast Charging ACTUALLY Ruin Your Battery?

You're becoming more of a truth seeker and journalist than before, you're adding a lot of value as you evolve beyond just reviewing tech to actually help us understand how it works. Thank you Marques.

As a retired engineer who specialized in battery technology, I'm here to say you've done a perfect job explaining battery charging.

Many years ago I was a programmer writing software for a battery development lab. One of the biggest things that we were working on was the most effective way to charge particular types of batteries. We had engineers, chemists, physicists, and, of course, programmers involved. An astounding amount of science for a simple process.

Sometimes I think we as consumers have become desensitized to how amazing our technology is. I like this type of content

Ok, fast charging allow you to charge FAST between 20% to 80% (in 10 minutes with a 120W fast charger). This interval is perfect to preserve battery life and doesn't create much heat. I have a 120W fast charging phone and after one and a half year, I lost ~4% of battery capacity (I use Accubattery to estimate the battery degradation). Basically my battery life hasn't really decreased and I don't have to wait for an hour to use my phone again.

I just want removable batteries to make its comeback.

don't activate french audio on this video, it's a nightmare ...

I love that your videos dont have background music ... & you speak to the audience at a natural pace. Also appreciate your effort to learn the stuff before conveying it to us, thanks bro! :D P.S. Love the humility in your speech, never change!

Linus did some experimenting on this a while back, IIRC he found that it's less about how fast the battery is charged, and more about the range. Fully charging and discharging battery puts a lot of stress on it. Doing so repeatedly degrades the battery. Doing so repeatedly while also at high temperature, really degrades the battery.

I'd certainly take a thicker phone if it meant improved durability, sd card slot, and room for a larger, and/or user swapable battery.

Wow, this was actually a really good video. Recently purchased a S23+ and a 45W charger but I saw in another video that it makes almost no difference from a 25W charger. Maybe like 10 minutes in charging time. I went with the S23+ for a bigger battery and faster charging speed. So far I am unable to drain the battery, it's very energy efficient. Thank you for this video.

Love your videos, keep up the good work. I know it's a lot of hard work getting out good quality videos 👍

Man I miss the days of user swappable batteries. You never had to worry about running out of juice. You just carried extra batteries with you and in just a few seconds you were back to 100%.

It's mostly all about heat. If less heat is produced and more the heat is spread out, the battery doesn't suffer as much from charging and doesn't wear as much. I don't know what is the exact sweet temperature to achieve 80+ watt charging at, with the least possible wear, but it is hard to maintain as the battery wants to warm up as it charges. Good to also mention that the battery degradation isn't linear to the charge cycles, but it starts off with a large wear amount per charge when it's new, heading to a more mild wear amount. For example, the first 150 charge cycles (lets say degradation from 100% to 97%) could degrade your battery as much as the next 300 cycles would (from 97% degradation to only 94%, instead of 91%).

MAD RESPECT!!! This guy had a really good question, then did the research behind the answer. True hero!

A year later and people like me still search for this exact video. Thanks again Marques <3

This has got to be my all time favorite MKBHD video! It's literally everything you need to know about your phone battery.

An actual test of this would be fun. Charge a few different phones at different wattages over 100 cycles, measure heat during charge, and measure capacity at the end.

Marques, i am an old guy and you are absolutely the ONLY tech guy i trust and follow. I base all of my tech choices on your research and opinions. AND you have a magic personality. All the best to you young man. JT from downunder.

Very well documented, the depth of knowledge in 12mins. Hats off